Apartment MarketData's target is to survey 90 percent of multifamily projects over 100 units each quarter. As a rule, these represent all properties except those that are leased but not occupied units. ​

Age Group: All information is grouped into six age categories — properties built before 1970 and properties built in the 1970s, 1980s, 1990s, 2000s, and 2010s.

Rate: Rental Rate is the average market rate expressed as ($/SF/month).